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divide, I believe, stones into three great groups — of Sandstone, granite and chalk; or the sedimentary, organic, and igneous, following their physical characteristics just as the psychologists and spiritualists divide man into the trinity of body, soul, and spirit. Our method is totally different. We divide minerals (also the other kingdoms) according to their occult properties, i.e., according to the relative proportion of the seven universal principles which they contain. I am sorry to refuse you, but I cannot, am not permitted to answer your question. To facilitate for you a question of simple nomenclature, however, I would advise you to